<?php

/**
 * Created by PhpStorm.
 * User: o0无忧亦无怖
 * Date: 2015/12/31
 * Time: 14:02
 */

class Sina_auth
{
    private $api_url='https://api.weibo.com/2/';
    public $format='json';

    public function __construct($data){
        $this->client_id=$data['client_id'];
        $this->client_secret=$data['client_secret'];
        $this->access_token=$data['access_token'];
    }

    //生成授权网址
    public function login_url($callback_url){
        $params=array(
            'response_type'=>'code',
            'client_id'=>$this->client_id,
            'redirect_uri'=>$callback_url
        );
        return 'https://api.weibo.com/oauth2/authorize?'.http_build_query($params);
    }

    //获取access token
    public function access_token($callback_url, $code){
        $params=array(
            'grant_type'=>'authorization_code',
            'code'=>$code,
            'client_id'=>$this->client_id,
            'client_secret'=>$this->client_secret,
            'redirect_uri'=>$callback_url
        );
        $url='https://api.weibo.com/oauth2/access_token';
        return $this->http($url, http_build_query($params), 'POST');
    }

    /**
    //使用refresh token获取新的access token，新浪微博暂时不支持
    public function access_token_refresh($refresh_token){
    }
     **/

    //获取登录用户的uid
    public function get_uid(){
        $params=array();
        return $this->api('account/get_uid', $params);
    }

    //根据uid获取用户信息
    public function show_user_by_id($uid){
        $params=array(
            'uid'=>$uid
        );
        return $this->api('users/show', $params);
    }

    //发布微博
    public function update($img_c, $pic=''){
        $params=array(
            'status'=>$img_c
        );
        if($pic!='' && is_array($pic)){
            $url='statuses/upload';
            $params['pic']=$pic;
        }else{
            $url='statuses/update';
        }
        return $this->api($url, $params, 'POST');
    }

    //根据uid获取用户微博列表
    public function user_timeline($uid, $count=10, $page=1){
        $params=array(
            'uid'=>$uid,
            'page'=>$page,
            'count'=>$count
        );
        return $this->api('statuses/user_timeline', $params);
    }

    //调用接口
    /**
    //示例：根据uid获取用户信息
    $result=$sina->api('users/show', array('uid'=>$uid), 'GET');
     **/
    public function api($url, $params=array(), $method='GET'){
        $url=$this->api_url.$url.'.'.$this->format;
        $params['access_token']=$this->access_token;
        if($method=='GET'){
            $result=$this->http($url.'?'.http_build_query($params));
        }else{
            if(isset($params['pic'])){
                uksort($params, 'strcmp');
                $str_b=uniqid('------------------');
                $str_m='--'.$str_b;
                $str_e=$str_m. '--';
                $body='';
                foreach($params as $k=>$v){
                    if($k=='pic'){
                        if(is_array($v)){
                            $img_c=$v[2];
                            $img_n=$v[1];
                        }elseif($v{0}=='@'){
                            $url=ltrim($v, '@');
                            $img_c=file_get_contents($url);
                            $url_a=explode('?', basename($url));
                            $img_n=$url_a[0];
                        }
                        $body.=$str_m."\r\n";
                        $body.='Content-Disposition: form-data; name="'.$k.'"; filename="'.$img_n.'"'."\r\n";
                        $body.="Content-Type: image/unknown\r\n\r\n";
                        $body.=$img_c."\r\n";
                    }else{
                        $body.=$str_m."\r\n";
                        $body.='Content-Disposition: form-data; name="'.$k.'"'."\r\n\r\n";
                        $body.=$v."\r\n";
                    }
                }
                $body.=$str_e;
                $headers[]='Content-Type: multipart/form-data; boundary='.$str_b;
                $result=$this->http($url, $body, 'POST', $headers);
            }else{
                $result=$this->http($url, http_build_query($params), 'POST');
            }
        }
        return $result;
    }

    //提交请求
    private function http($url, $postfields='', $method='GET', $headers=array()){
        $ci=curl_init();
        curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ci, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 30);
        curl_setopt($ci, CURLOPT_TIMEOUT, 30);
        if($method=='POST'){
            curl_setopt($ci, CURLOPT_POST, TRUE);
            if($postfields!='')curl_setopt($ci, CURLOPT_POSTFIELDS, $postfields);
        }
        $headers[]='User-Agent: weibo.PHP(piscdong.com)';
        curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ci, CURLOPT_URL, $url);
        $response=curl_exec($ci);
        curl_close($ci);
        $json_r=array();
        if($response!='')$json_r=json_decode($response, true);
        return $json_r;
    }
}
